Add uptime check taht warns if server has been up for too long

templates/scriptreceiver/check_max_uptime

@@ -0,0 +1,31 @@
+#!/usr/bin/env python3
+import argparse
+import sys
+
+parser = argparse.ArgumentParser()
+parser.add_argument('-w', '--warning',
+                    help='Warning threashold',
+                    required=True)
+parser.add_argument('-c', '--critical',
+                    help='Critical threashold',
+                    required=True)
+
+args = parser.parse_args()
+warning = int(args.warning)
+critical = int(args.critical)
+
+with open('/proc/uptime', 'r') as f:
+    uptime_seconds = float(f.readline().split()[0])
+days = int(uptime_seconds / 86400)
+
+status = "OK"
+exit = 0
+if days > warning:
+    status = "WARNING"
+    exit = 1
+if days > critical:
+    status = "CRITICAL"
+    exit = 2
+
+print(f"{status}: uptime {days} days | uptime={days};{warning};{critical};")
+sys.exit(exit)